﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.AddIn.Pipeline;
using System.AddIn.Contract;

namespace Calc1Contract
{
    //the AddInContractAttribute identifies this pipeline segment
    // as a contract
    [AddInContract]
    public  interface ICalcContract:IContract 
    {
        double Add(double x, double y);

        double Substract(double x, double y);

        double Mitiply(double x, double y);

        double Divide(double x, double y);
    }
}
